Impact wrench



FIG. 1 is a top plan view of an impact wrench showing my new design;

FIG. 2 is a side elevational view taken from the bottom of FIG. 1, the side opposite being a mirror image;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an impact wrench, as shown and described. 